Here is the situation i'm present with. Owner does not want his users to be able to delete items out of their deleted items folder. We are running SBS 2011 with Exchange 2010 SP3.
I know there is a retention that keeps email for 14 days I believe after it has been deleted from the deleted items folder. I am not sure of the options that are available to me, but i do not believe there is a way to prevent the user from deleting the items... maybe a way to prevent a purge or shift+delete a mail item?
I've also heard about journaling, but not sure what/how to use it. Maybe creating some kind of rule after an item has been deleted can move it to the journaling mailbox for the owner to peruse?